1 files changed, 67 insertions, 0 deletions
diff --git a/libpod/buildah/util.go b/libpod/buildah/util.go
new file mode 100644
index 000000000..96f9ebf86
--- /dev/null
+++ b/libpod/buildah/util.go
@@ -0,0 +1,67 @@
+package buildah
+
+import (
+	"github.com/containers/image/docker/reference"
+	"github.com/containers/storage"
+	"github.com/containers/storage/pkg/reexec"
+	"github.com/pkg/errors"
+)
+
+// InitReexec is a wrapper for reexec.Init().  It should be called at
+// the start of main(), and if it returns true, main() should return
+// immediately.
+func InitReexec() bool {
+	return reexec.Init()
+}
+
+func copyStringStringMap(m map[string]string) map[string]string {
+	n := map[string]string{}
+	for k, v := range m {
+		n[k] = v
+	}
+	return n
+}
+
+func copyStringSlice(s []string) []string {
+	t := make([]string, len(s))
+	copy(t, s)
+	return t
+}
+
+// AddImageNames adds the specified names to the specified image.
+func AddImageNames(store storage.Store, image *storage.Image, addNames []string) error {
+	names, err := ExpandNames(addNames)
+	if err != nil {
+		return err
+	}
+	err = store.SetNames(image.ID, append(image.Names, names...))
+	if err != nil {
+		return errors.Wrapf(err, "error adding names (%v) to image %q", names, image.ID)
+	}
+	return nil
+}
+
+// ExpandNames takes unqualified names, parses them as image names, and returns
+// the fully expanded result, including a tag.  Names which don't include a registry
+// name will be marked for the most-preferred registry (i.e., the first one in our
+// configuration).
+func ExpandNames(names []string) ([]string, error) {
+	expanded := make([]string, 0, len(names))
+	for _, n := range names {
+		name, err := reference.ParseNormalizedNamed(n)
+		if err != nil {
+			return nil, errors.Wrapf(err, "error parsing name %q", n)
+		}
+		name = reference.TagNameOnly(name)
+		tag := ""
+		digest := ""
+		if tagged, ok := name.(reference.NamedTagged); ok {
+			tag = ":" + tagged.Tag()
+		}
+		if digested, ok := name.(reference.Digested); ok {
+			digest = "@" + digested.Digest().String()
+		}
+		expanded = append(expanded, name.Name()+tag+digest)
+	}
+	return expanded, nil
+}